When I'm working on my comic, I rarely use references exept for some stuff I'm not familliar with. Because I love to draw from memory and I want to train it more. I do use alot of references for training though! My sketchbooks are full of poses and gestures 
I'm a huge advocate of using reference images as well. If you don't use them, you're training your mind, eye, and hand into repeating the same mistakes over and over - and it'll be much harder to untrain that later. Reference images are a must when you're a developing artist, as are gesture drawing exercises.
I use reference images in three ways:
Sometimes, for basic bust shots and the occasional full-body, I don't use reference. But that's often after I've spent a bunch of time practising gesture drawing, and I really have the human form 'in my fingers' that day, so to speak.
I don't use anatomy reference as much as I used to, but sometimes I still do, especially for complicated poses, expressions, or hand positions. I actually looked up several references for expressions today for the page I'm working on, and ended up taking a photo of my own fist for a reference at the angle I wanted. It helps.
I also use reference a lot for environments, objects, and animals, and I use it A LOT to get the color/lighting effects right. Because I use markers, and I get ONE SHOT at getting my colors down correctly. So I do a lot of research and a lot of practice.
Btw, if anyone wants the fist pic for reference, here you go: 
Thanks to everyone who responded. Funnily enough, I've now com across a situtaion where I DO need a referance image, and found this website where you manipulate a 3D figure to get the proper position you need. Here is what I'm doing with it.
To anyone who wants to check the site out, here's the link.
By the way I do usually attempt to make positions before referring to reference images. As mentioned, I only really use them when I feel I really need to.
All the time! Not really for poses, but often for design inspiration for costumes, buildings etc. Most of it is vaguely medieval european, since that's the flavour of my fantasy world, but I'll save anything that catches my eye. My Pinterest board overfloweth:
That's kind of what I mostly use it for. just earlier I had used referance images to help design a Gym.
I believe that everyone is always drawing from reference.
Sometimes the memory of the reference is some years old, sometimes the memory is one second old
when you are looking at it while you draw.
You draw your version of what you saw or combine it with something that you already know how
to draw which became your style or you drew it so often that it became muslce memory.
But I think your question is if we have the reference open while we draw. I usually do that for poses and things
I have never drawn. I just drew a wolf chilling in the forest. I used a reference picture for the sitting pose,
one for the head because I never drew a wolf, one for tree stump he was sitting on. I drew the clothes from
memory.
I could have tried to draw it all from my head and it would have also worked but it would have looked differently.
I also use style reference, I want it to look a bit like Asterix & Obelix and that´s why I always have Asterix comics
next to me and copy the way the artist draws trees
Not much? 
Reference usage frequently leaves me with a much less energetic picture, which I hate. I am trying to use them more now for a better anatomy and clothes depiction, because I almost never ever used any references until two years ago maybe.
I think it's mostly the inability to use them better, because we're not used to it Definitely worth the try though 
Honestly I should use them more XD Most of the time I use them if I'm really struggling with a pose ig
All time time, think when I don't use references my art tends to look a little to static and stale in my eyes so just seeing different references for poses and what not helps change things up a bit as well as making sure everything looks right antomically
Whenever there's a specific dynamic pose I'm trying to go for or if I just can't imagine the form someone would take for an action, that's when I use references the most. Or if there's a specific angle I want to achieve and I need to know how everything looks proportionally from said angle. If I can't find photos online, I usually just take photos of myself and base it off that. And if the character I'm drawing doesn't match my body type, I go to 3D models.
I plan on using them more because when I look back at my drawings, I see how stiff or unnatural some characters look when I don't use references.
I think what's good is using the reference for the pose itself, so not exactly copying the pose but just using it as a way to guide how you kind of want the pose or stance to look.
But yeah I have a friend who is a artist as well who has the same sentiments, that sometimes using references kind of restricts their art in a way, so it does for sure depends on what the artist feels comfortable with
I'd say very often! Drawing by memory is pretty hard, especially if you're trying to draw a specific pose or an object with a more complex shape.
Drawing references are an artist's best friend tbh and I wouldn't be able to do much without them. They should always be used as a way to improve and to analyze the shapes, to understand how that something is made.
Other times I use drawing references to get some inspiration for character design, it really depends.
Whenever you draw you always use reference.
Your drawing is an interpretation of what you saw.
People who say that they don´t use reference also draw from
what they remember of something they saw at some point.
Or they combine it with something else they saw / added to their
visual library. You can also combine different elements of your
visual library. It works like learning an instrument or language
Some people have built up a big visual memory of reference and
it´s something a lot of artists aim for. For me it always made sense
to have some standard poses which I can draw from memory
and that I can draw the main character of the comic without looking
at the character sheet.
I need a lot of reference next to my drawing because it´s really hard
for me to remember poses + I have a proportion reference under
my drawing all the time
and I just realized that I replied to this topic before 
I use references for anatomy, and when I have to draw an environment or a prop. Or for animals, to understand how their body works. I'm very bad at drawing by memory: even if I know someone, if they change the hair I don't recognize them anymore. I recognize an actor's face only after drawing them a lot. Watching a movie or tv series, if there are two men or women with similar hair color and haircut, I'm not able to tell one from the other.
So I do need references very much.
I use references occasionally, though much less these days than when I started my comic. Drawing certain things becomes easier the more you do it, so the need for references drops. However when new things are introduced references become needed again.
For me, pose references have been the most needed during my webcomic. Getting the anatomy and the angles just right can be difficult from just memory, so it's better to use a reference to see how it should go. I rarely use online references and prefer to use myself either by taking a photo (in case of difficult angles) or just using a mirror. Using myself allows me to find just the right pose I need and takes less time than finding the right photo online.
Using references is also a talent that needs to be practised on it's own. A lot of people have this idea that using a reference means copying something but it's more about seeing how something works. When I reference my own pose I don't draw myself in that pose, but I check how my body looks in that pose and try to capture the motion and see what my body is doing in that pose. If I want to draw an animal I'm not familiar with I don't just look for one photo, but a whole bunch of them and study them in order to draw the animal.
I am 100% supportive of using references because they are a tool that helps figure out how things look and work. References also take away some of the pressure of being able to draw anything and everything. I couldn't draw a car for the life of me from memory but with good references? Hell yeah, I can draw a car.
